Wrench



Patented Oct. 27, 1936 UNITED STATES PATENT OFFICE Application July 25,

1 Claim.

The object of the invention is to provide a wrench in which the jaws arerelatively movable to provide for adjustment for various size nuts andto accomplish such adjustment by the one hand in which the wrench iscarried so that the jaw setting operation may be readily accomplishedwhere the use of two hands is impossible or inconvenient; and to providea wrench of the kind indicated which is of simple form and susceptibleof cheap manufacture.

With this object in view, the invention consists in a construction andcombination of parts, of which a. preferred embodiment is illustrated inthe accompanying drawing, wherein:

Figure 1 is a side elevational view of a wrench constructed inaccordance with the invention.

Figure 2 is an edge elevational view.

Figure 3 is a sectional view on the plane indicated by the line 3--3 ofFigure 2.

Figure 4 is a sectional view on the plane indicated by the line 4-4 ofFigure 1.

While the invention is shown incorporated in the conventional form ofwrench in which the stationary jaw I is integral with the combined shankand handle l I, it is applicable to any other form of wrench in whichturning movement is employed to adjust the movable jaw I2 toward andaway from the stationary jaw. In the illustrated embodiment showing theconventional form of wrench, the shank H is provided on the one edgewith the rack teeth M of the proper inclination to be engaged with thethread of the worm I5, the latter being disposed in an opening in thejaw l2, so as to rotate freely therein, and to this end being carried ona stem [6 arranged parallel with the shank II, the stem extendingthrough the jaw [2 on opposite sides of the opening to provide journalportions for the stem. The stem is substantially coextensive in lengthwith the combined shank and handle portion l l and in the handle areapasses through a slide I! which is adapted for movement over the shankll throughout the handle area, which Cir 1935, Serial No. 33,165

is graduated in fractions of an inch as indicated at [8.

The stem I6 is angularly but not axially movable with respect to theslide ll, said stem having a collar l9 abutting the slide on one end anda ferruled portion 20 of a handle 2| abutting the slideon the oppositeend. The handle 2| is of the general form of the conventional screwdriver handle and its diameter is greater than the thickness of theshank II, so that it may be readily grasped by the fingers of the handin which the handle portion of the shank II is carried.

The scale [8 formed on the handle area of the shank ll provides, inconnection with the slide ii, an indicator from which the spacing of thejaws H and 12 may be determined.

The wrench when held in the hand may be readily adjusted by manipulationof the fingers on the handle 2|, so that in the event the user mustemploy one hand to hold the work being operated upon, he may make thenecessary jaw adjustment readily with the other hand.

The invention having been described, what is claimed as new and usefulis:

A wrench comprising fixed and movable jaws, a combined shank and handlemember with which the former jaw is fixedly connected and on which thelatter is slidably mounted, a rotary member carried by the movable jawand having positive operative connection with the shank to traverse thelatter and effect movement of the jaw along the shank, a stem fixed withrespect to said rotary member and paralleling the shank, and a handlecarried at the end of the stem adjacent the handle area of the shank,the shank being formed with a scale graduated in linear units and havinga slide mounted thereon movable over the scale, the slide beingoperatively connected with the stem to permit relative angular movementbetween it and the stem but to preclude relative axial movement betweenthe two.

CARL FREDERICK CARLSON.

